Pavement cutting device



Nov. 23, 1965 L. E. HAYNES PAVEMENT CUTTING DEVICE 5 Sheets-Sheet 1 Filed March 26, 1963 Fig.

Fig.2

Louis E. Haynes 1N VENTOR.

Nov. 23, 1965 E. HAYNES 3,219,388

PAVEMENT CUTTING DEVICE Filed March 26, 1963 5 Sheets-Sheet 2 2 /4 Fig. 3/ I 5 I ,8

MIN

VIEYIIIIF' Louis E Haynes INVENTOR.

Nov. 23, 1965 L. E. HAYNES 3,219,383

PAVEMENT CUTTING DEVICE Filed March 26, 1963 3 Sheets-Sheet 3 TLEE a INVENTOR. Laws [2 HA YA/E-S United States Patent 3,219,388 PAVEMENT CUTTING DEVICE Louis E. Haynes, Union City, Tenn, assignor to The Three H Corporation, Luther, Okla, a corporation of Oklahoma Filed Mar. 26, 1963, Ser. No. 268,133 2 Claims. (Cl. 29937) This invention primarily relates to a device for cutting, removing and conveying earth, gravel, asphalt, rock, or the like disposed on a road surface which is being regraded.

It has often been a problem to effectively resurface a roadbed keeping the cost of labor and material at a minimum. Accordingly, it is an object of this invention to combine various operations of the resurfacing process of a roadbed by providing a device which can effectively cut the asphalt of the roadbed, and convey the cut portions thereof to a suitable heated tank wherein the asphalt can be quickly remelted and respread thus saving considerable costs.

Another object of this invention resides in the provision wherein the device may be quickly and effectively attached to a conventional land surface vehicle whereby the adjustment of the cutting device may be quickly effected.

A still further object of this invention in accordance with the preceding objects herein specified, resides in the provision of means connected to the cutter blades of the device which reciprocate some of the blades out of phase with each other to thereby make the device continuously effective for cutting the pavement or asphalt.

Yet another object of this invention resides in the fact that the reciprocating blades may be driven utilizing a power take-off from the vehicle to which it is attached.

Another object of this invention resides in the fact that the device is efiicient in operation and requires a minimum number of parts and maintenance.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is a side elevational view of the device showing it adjustably attached to a tractor or the like.

FIGURE 2 is a longitudinal section through the center of the device and illustrates the relationship of the various components therein.

FIGURE 3 is a sectional view taken substantially along the plane of the line 33 of FIGURE 2.

FIGURE 4 is a sectional view taken substantially along the plane of the 4-4 of FIGURE 2 and illustrates the guide means for the reciprocating cutter blades of the invention.

FIGURE 5 is a fragmentary side elevational view of the device with the cover shield for the conveyor drive assembly removed to more clearly illustrate the latter.

FIGURE 6 is a detail view illustrating the elements utilized to connect the pavement cutting device of the present invention to a tractor by a four point hitch connection and showing the manner in which the driving elements are used to adjust the elevation and vertical inclination of the pavement cutting device with respect to the ground.

FIGURE 7 is a view similar to FIGURE 6 illustrating the pavement cutting device as it is positioned by the actuating elements on a tractor preparatory to driving the device into the ground.

FIGURE 8 is a plan view illustrating the manner in 3,219,338 Patented Nov. 23, 1965 which the pavement cutting device is connected to the tractor by a plurality of links.

Referring now to the drawings in detail, the pavement cutting device comprising the subject matter of the instant invention is generally designated by the numeral 10 and comprises a frame including a pair of upstanding side walls 12 and 14. The upstanding flanges 12 and 14 have disposed thereon at the rear thereof a plurality of pins such as 18 which cooperate with links such as 20 and 22 of a tractor or other land-type vehicle 24. Due to this arrangement, it should be appreciated that the device may be elevated or tilted in a conventional manner by raising the lifting arms or links 20, 22 by means of the conventional tool lifting assemblies 25.

FIGURES 6, 7 and 8 show more clearly the manner in which the arms or links 20 and 22 function in the operation of the pavement cutting device to permit the deviceto be controlled from the tractor. The links 22 are connected on the tractor to an arm which is pivotally connected to a support beam 82 for pivotation about a pivotal axis 84. The arm 80 is driven in its pivotal movement by a suitable cylinder 25 mounted on the tractor and fixed to an upright stanchion 86. Upon pivotation of the arm 80, the outer end of the link 22 is elevated, thus lifting the pavement cutting device 10 upwardly. If it is then desired to drive the pavement cutting device into the ground with the tractor, the link 20 can be reciprocated rearwardly, that is, from the tractor toward the pavement cutting device by means of a suitable cylinder 88 which is also mounted on the tractor. The pavement cutting device is thus inclined with respect to the ground and can be driven into the ground by moving the tractor toward the pavement cutting device. The arrangement of the arm 80, upright stanchion 86 and cylinders 25 and 88 on the tractor are conventional and well understood in the art. These elements can be found on a D2 Caterpillar tractor.

Extending between the flanges 12, 14 of the frame at the front portion thereof is a cutter blade supporting bar 26. The cutter blade supporting bar cooperates with a cutter blade retaining bar 28 and spacer means such as 39 to form a plurality of guide channels such as 32 which slidably receive a plurality of cutter blades 34. Suitable fastening elements such as 35 extend through the cutter blade retaining bar 28, spacers 3t and terminate in the cutter blade support bar to hold the parts together and form an integral structure.

The cutter blades 34 are slidably received within the guide channels 32 transversely of the device between the flanges 12 and 14 of the frame and include an enlarged head 36 which is tapered as shown at 38 and terminates in a sharp cutting edge 40. A reduced portion of the cutter blade as shown at 42 is received within the guide channels.

As shown in FIGURE 3, some of the cutter blades are adapted to reciprocate out of phase from adjacent cutter blades in order to provide a continuous cutting action on the pavement. To produce this motion, each of the reduced portions 42 of the cutter blades 34 has mounted at the rear thereof a suitable crankpin bearing 44. It should be appreciated that the bearings are fixed to the cutter blades and move therewith. Rotatably journaled within each of the bearings 44 is a crank arm 46 connected to its bearing 44 by means of a crankpin 48. Each of the crank arms 46 is rigidly received at its end remote from the crankpin 48 on a crankshaft generally designated by the numeral 5t) which in turn is journaled within a pair of bearings 52 and 54 mounted on the flanges 14 and 12 respectively. As will be seen from FIGURES 2 and 3, the crankshaft 50 has laterally offset portions 56 and 58 disposed in different planes about the circumference of the shaft. The crank arms or connecting rods 46 are journalled from the offset portions or throws 56 and 58 and are thereby conditioned to rotate out-ofphase from each other thus causing the cutter bars to present their cutting edges 40 to the pavement at staggered times. More specifically, the portions 56 and 58 of the crankshaft 50 are offset in planes 90 from each other and are presented in alternate staggered relationship across the crankshaft 50.

The crankshaft is driven by means of a power shaft 60 universally attached to a power shaft 62 of the tractor. The shaft 60 extends into a suitable gear box 63 which receives the crankshaft 50 and has a spline connection or the like therewith so that upon rotation of the shaft 60 the crankshaft 50 will be caused to rotate in a plane perpendicular to the plane of rotation of the power shaft 60. The gear box 63 may further contain means to reduce the speed of rotation of the crankshaft 50 with respect to the power shaft 62.

A pair of rollers 64 and 66 are also journaled between the flanges 12 and 14 of the frame. A suitable endless conveyor belt 68 extends between the rollers and is adapted to convey cut asphalt or pavement to a scoop pan 70 located rearwardly of the rollers 66 and strung transversely between the side flanges 12 and 14 of the frame. It should be noted that the cutter blade support bar 26 has an inclined surface approximately the angle of the upper run of the conveyor belt 68 whereby cut pavement will be directed to said bar 26 which is immediately behind the head 36 of the cutter blade and the conveyor 68 may then pick up this material disposed upon the inclined surface of the support bar 26.

The roller 66 is adapted to be driven to cause the conveyor belt 68 to operate by means of a direct drive connection with one end of the crankshaft as shown at 72 which extends through the flange 12 and has a suitable sprocket member 74 attached thereto. An endless belt 76 retained on the sprocket 74 is connected to another sprocket 75 attached to the adjacent end of the shaft of the roller 66 in a like manner. A chain guard 78 covers this chain as shown in FIGURES 1 and 3.

The operation of the device should now be readily apparent. The cutting blades are adjusted to the correct cutting depth and angle by means of the arms 20, 22 of the tractor. Upon actuation of the power shaft 60 the crankshaft 50 through crank arms 46 and crankpin bearings 44 will drive and reciprocate the cutter blades out-of-phase in the channel guides 34, thereby effectively cutting the pavement. The cut pavement or asphalt will be disposed upon the inclined surface 26 of the cutter blade support bar and from there will be conveyed by the conveyor 68 to the scoop pan 70. As before mentioned, a suitable attachment may be disposed at the rear of the frame attached to the flanges 12, 14 to receive the cut asphalt from the scoop pan 70 to remelt and redeposit the asphalt upon the regraded road surface.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A device for cutting and removing asphalt and the like comprising frame means including a pair of transversely spaced upstanding side walls and guide means forming a plurality of longitudinally extending and transversely spaced guide channels; a plurality of elongated, horizontal cutter blades transversely spaced and slidably received in the guide channels of said frame means for longitudinal reception on said frame means; a crankshaft including a pluralityof longitudinally spaced throws journaled from said frame means for rotation about a transverse horizontal axis; a plurality of connecting rods having one set of ends journaled from said throws and the other set of ends journaled from said blades; drive means drivingly connected to said crankshaft; at least some of said throws being angularly disposed relative to each other about the axis of rotation of said crankshaft and thereby causing at least some of said cutter blades to reciprocate in out-of-phase relation from the others; and conveyor means mounted on the frame means adjacent to and rearwardly of the cutting portions of said cutter blades for removing asphalt cut by the blades.

2. A device for cutting and removing asphalt and the like comprising frame means including a spacer means positioned between each adjacent pair of cutter blades as hereinafter defined to form a guide channel for each of said cutter blades;

a plurality of elongated, horizontal cutter blades transversely spaced and slidably received in the guide channels of said frame means for longitudinal reciprocation on said frame means;

a crankshaft including a plurality of longitudinally spaced throws journaled from said frame means for rotation about a transverse horizontal axis;

a plurality of connecting rods having one set of ends journaled from said throws and the other set of ends journaled from said blades;

drive means drivingly connected to said crankshaft;

at least some of said throws being angularly disposed relative to each other about the axis of rotation of said crankshaft and thereby causing at least some of said cutter blades to reciprocate in out-of-phase relation from the others; and

conveyor means mounted on the frame means adjacent to and rearwardly of the cutting portions of said cutter blades for removing asphalt cut by the blades.

References Cited by the Examiner UNITED STATES PATENTS 2,209,710 7/1940 Wood 94-40 2,245,544 6/ 1941 Miller. 2,424,459 7/ 1947 Hettelsater 94-40 2,546,907 3/ 1951 Sherwood 94-40 2,777,680 1/ 1957 Robb. 3,074,090 1/ 1963 Thompson 29937 X CHARLES E. OCONNELL, Examiner.

BENJAMIN HERSH, E. R. PURSER,

Assistant Examiners. 

2. A DEVICE FOR CUTTING AND REMOVING ASPHALT AND THE LIKE COMPRISING FRAME MEANS INCLUDING A SPACER MEANS POSITIONED BETWEEN EACH ADJACENT PAIR OF CUTTER BLADES AS HEREINAFTER DEFINED TO FORM A GUIDE CHANNEL FOR EACH OF SAID CUTTER BLADES; A PLURALITY OF ELONGATED, HORIZONTAL CUTTER BLADES TRANSVERSELY SPACED AND SLIDABLY RECEIVED IN THE GUIDE CHANNELS OF SAID FRAME MEANS FOR LONGITUDINAL RECIPROCATION ON SAID FRAME MEANS; A CRANKSHAFT INCLUDING A PLURALITY OF LONGITUDINALLY SPACED THROWS JOURNALED FROM SAID FRAME MEANS FOR ROTATION ABOUT A TRANSVERSE HORIZONTAL AXIS; A PLURALIRY OF CONNECTING RODS HAVING ONE SET OF ENDS JOURNALED FROM SAID THROWS AND THE OTHER SET OF ENDS JOURNALED FROM SAID BLADES; DRIVE MEANS DRIVINGLY CONNECTED TO SAID CRANKSHAFT; AT LEAST SOME OF SAID THROWS BEING ANGULARLY DISPOSED RELATIVE TO EACH OTHER ABOUT THE AXIS OF ROTATION OF SAID CRANKSHAFT AND THEREBY CAUSING AT LEAST SOME OF SAID CUTTER BLADES TO RECIPROCATE IN OUT-OF-PHASE RELATION FROM THE OTHERS; AND CONVEYOR MEANS MOUNTED ON THE FRAME MEANS ADJACENT TO AND REARWARDLY OF THE CUTTING PORTIONS OF SAID CUTTER BLADES FOR REMOVING ASPHALT CUT BY THE BLADES. 